mirror of
https://github.com/OpenDiablo2/OpenDiablo2
synced 2024-06-12 02:30:43 +00:00
acc4c7a13e
* fixed lint errors in button.go * fixed lint errors in checkbox.go * Removed d2ui singleton, fixed nearly all lint errors - Changed `UI` struct to `UIManager`, removed singleton - UI element provider functions are now methods of the UI Manager - Screens now use the UI manager to create UI elements - game panels in d2player now use the UI Manager to create UI elements - Only the UI manager knows about "widgets"; calls to `d2ui.AddWidget` in Screen instances have been removed * changed ui element provider methods from `Create` to `New`
99 lines
2.3 KiB
Go
99 lines
2.3 KiB
Go
package d2screen
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import (
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"log"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
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"github.com/OpenDiablo2/OpenDiablo2/d2core/d2gui"
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"github.com/OpenDiablo2/OpenDiablo2/d2core/d2ui"
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)
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// ScreenManager manages game screens (main menu, credits, character select, game, etc)
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type ScreenManager struct {
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uiManager *d2ui.UIManager
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nextScreen Screen
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loadingScreen Screen
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loadingState LoadingState
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currentScreen Screen
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}
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// SetNextScreen is about to set a given screen as next
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func (sm *ScreenManager) SetNextScreen(screen Screen) {
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sm.nextScreen = screen
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}
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// Advance updates the UI on every frame
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func (sm *ScreenManager) Advance(elapsed float64) error {
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switch {
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case sm.loadingScreen != nil:
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// this call blocks execution and could lead to deadlock if a screen implements OnLoad incorreclty
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load, ok := <-sm.loadingState.updates
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if !ok {
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log.Println("loadingState chan should not be closed while in a loading screen")
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}
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if load.err != nil {
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log.Printf("PROBLEM LOADING THE SCREEN: %v", load.err)
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return load.err
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}
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d2gui.ShowLoadScreen(load.progress)
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if load.done {
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sm.currentScreen = sm.loadingScreen
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sm.loadingScreen = nil
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d2gui.ShowCursor()
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d2gui.HideLoadScreen()
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}
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case sm.nextScreen != nil:
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if handler, ok := sm.currentScreen.(ScreenUnloadHandler); ok {
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if err := handler.OnUnload(); err != nil {
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return err
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}
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}
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sm.uiManager.Reset()
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d2gui.SetLayout(nil)
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if handler, ok := sm.nextScreen.(ScreenLoadHandler); ok {
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d2gui.ShowLoadScreen(0)
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d2gui.HideCursor()
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sm.loadingState = LoadingState{updates: make(chan loadingUpdate)}
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go func() {
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handler.OnLoad(sm.loadingState)
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sm.loadingState.Done()
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}()
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sm.currentScreen = nil
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sm.loadingScreen = sm.nextScreen
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} else {
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sm.currentScreen = sm.nextScreen
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sm.loadingScreen = nil
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}
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sm.nextScreen = nil
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case sm.currentScreen != nil:
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if handler, ok := sm.currentScreen.(ScreenAdvanceHandler); ok {
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if err := handler.Advance(elapsed); err != nil {
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return err
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}
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}
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}
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return nil
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}
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// Render renders the UI by a given surface
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func (sm *ScreenManager) Render(surface d2interface.Surface) error {
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if handler, ok := sm.currentScreen.(ScreenRenderHandler); ok {
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if err := handler.Render(surface); err != nil {
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return err
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}
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}
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return nil
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}
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